焦化廠主要生產(chan)焦碳、商業煤(mei)氣、硫銨(an)和輕苯(ben)等化工(gong)(gong)(gong)產(chan)品。該廠焦油(you)(you)回收系統采(cai)用硫銨(an)流程，焦油(you)(you)加(jia)工(gong)(gong)(gong)采(cai)用管式爐兩塔連(lian)續蒸(zheng)餾，工(gong)(gong)(gong)業奈生產(chan)工(gong)(gong)(gong)藝為雙爐雙塔連(lian)續蒸(zheng)餾、洗滌(di)(di)、精制。在焦爐煤(mei)氣冷卻、洗滌(di)(di)、粗(cu)苯(ben)加(jia)工(gong)(gong)(gong)及焦油(you)(you)加(jia)工(gong)(gong)(gong)過程中，產(chan)生含有(you)酚(fen)、氰、油(you)(you)、氨及大量(liang)有(you)機物的(de)工(gong)(gong)(gong)業廢水(shui)。

　　焦化(hua)(hua)(hua)(hua)(hua)(hua)廢水成(cheng)份復雜其主要包含多環芳香(xiang)族化(hua)(hua)(hua)(hua)(hua)(hua)合物(wu)、酚類化(hua)(hua)(hua)(hua)(hua)(hua)合物(wu)以及含氮(dan)、氧、碳的雜環化(hua)(hua)(hua)(hua)(hua)(hua)合物(wu)等有機(ji)物(wu)與硫化(hua)(hua)(hua)(hua)(hua)(hua)物(wu)、氰(qing)化(hua)(hua)(hua)(hua)(hua)(hua)物(wu)、硫氰(qing)化(hua)(hua)(hua)(hua)(hua)(hua)物(wu)等無機(ji)物(wu);含大量難(nan)降解物(wu)質和有毒有害(hai)物(wu)質;色度高(gao)，有機(ji)物(wu)性質非常(chang)穩定可生化(hua)(hua)(hua)(hua)(hua)(hua)性差;氨氮(dan)濃(nong)度高(gao)，危害(hai)巨大;水質變(bian)化(hua)(hua)(hua)(hua)(hua)(hua)幅(fu)度大。

　　焦化廢(fei)水處理工藝流程

　　“物化處(chu)理(li)+預處(chu)理(li)+生化處(chu)理(li)+后處(chu)理(li)+深度凈化處(chu)理(li)”的聯合處(chu)理(li)工藝

　　物化處(chu)理：高(gao)濃度廢(fei)水(shui)(shui)在(zai)送至廢(fei)水(shui)(shui)處(chu)理系(xi)統前應進(jin)行(xing)(xing)除油(you)和(he)蒸(zheng)氨(an)處(chu)理，且蒸(zheng)氨(an)應加(jia)堿脫除固定氨(an)。對含(han)油(you)量較高(gao)的(de)焦(jiao)化廢(fei)水(shui)(shui)，在(zai)預處(chu)理段應進(jin)行(xing)(xing)除油(you)預處(chu)理。污水(shui)(shui)處(chu)理后送熄焦(jiao)、洗煤(mei)和(he)煉鐵沖渣的(de)廢(fei)水(shui)(shui)，可不進(jin)行(xing)(xing)深(shen)度凈化處(chu)理。

　　預處理：隔(ge)油池(chi)、氣(qi)浮(fu)池(chi)、調節池(chi)

　　生化處理：

　　(1)厭氧/缺(que)氧/好(hao)氧(A/A/O)生物脫氮工藝流程

　　(2)“缺氧/好氧(A/O)”活性(xing)污泥法脫(tuo)氮工藝

　　(3)缺氧/好氧(A/O)”生物膜法脫氮工藝

　　后(hou)處(chu)理：絮凝沉淀、過(guo)濾(lv)(lv)。絮凝沉淀后(hou)廢水宜進行過(guo)濾(lv)(lv)處(chu)理。過(guo)濾(lv)(lv)宜采用雙層濾(lv)(lv)料過(guo)濾(lv)(lv)器，上層濾(lv)(lv)料為(wei)無(wu)煙煤，下層為(wei)石英砂。

　　深度處(chu)理(li)：強氧化處(chu)理(li)，膜法處(chu)理(li)和脫鹽處(chu)理(li)。